Bought a couple years ago and used 2 or 3 times, but just never use it.
Here's a link to what it is:
https://www.explorertechnologyllc.co...o2-keg-adapter
$30 shipped
http://www.cavediver.net/forum/attac...36&cid=1&stc=1http://www.cavediver.net/forum/attac...37&cid=1&stc=1
